Floor drain



FIG. 1 is a perspective view of a floor drain;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines are for the purposes of illustrating portions of the floor drain and form no part of the claimed design. 

CLAIM The ornamental design for a floor drain, as shown and described. 